Method and apparatus for improved cell detection
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsBengt Lindoff, Johan Nilsson, Bo Bernhardsson
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Abstract
A method and apparatus for improved cell detection in a cellular communication system correlates a received signal with both a primary synchronization signal and a secondary synchronization signal. The results from the primary and secondary synchronization detection are used to determine if a new cell has been found. By also including the secondary synchronization signal during the cell detection procedure, the rate of false detection can be reduced while still maintaining detection performance. In addition, a longer standby time can be achieved for the user terminal.
Claims31
A method for cell detection in a communication system comprising:
- receiving a communication signal;
- correlating the received signal with a primary synchronization signal to produce a primary detection signal;
- correlating the received signal with a secondary synchronization signal to produce a secondary detection signal;
- and
- detecting a new cell based on the primary detection signal and the secondary detection signal.
A method for cell detection in a communication system comprising:
- receiving a communication signal;
- correlating the received signal with a primary synchronization signal to produce a primary detection signal;
- correlating the received signal with a secondary synchronization signal to produce a secondary detection signal;
- determining a decision variable from the primary detection signal;
- comparing the decision variable to a first threshold;
- determining that a new cell has been found if the decision variable is greater than the first threshold;
- comparing the decision variable to a second threshold if the decision variable is less than the first threshold;
- and
- using the secondary detection signal to determine if a new cell has been found if the decision variable is less than the first threshold and the decision variable is greater than the second threshold.
An apparatus for cell detection in a communication system comprising:
- a front end receiver for receiving a communication signal;
- a primary synchronization channel correlator for correlating the received signal with a primary synchronization signal to produce a primary detection signal;
- a secondary synchronization channel correlator for correlating the received signal with a secondary synchronization signal to produce a secondary detection signal;
- and
- a detector for determining if a new cell has been found using the primary detection signal and the secondary detection signal.
Dependencies are inferred from the claim text.